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TOEFL IELTS BNC: 6903 COCA: 5718
span
noun [C] [usually singular] /spæn/
singularspan
pluralspans
  1. 1
    the amount of time that something lasts 持续的时间

    Nearly 100 witnesses testified over a span of 20 days. 在20天内有近100名证人出庭作证。

    attention/concentration span (=the period for which you can pay attention/concentrate) 注意力集中的时间 :

    Kids these days have a very limited attention span. 现在的孩子们注意力集中的时间非常有限。

     Synonyms and related words
    General periods of time: a clear run, a page in something's history, block...
    See also lifespan
  2. 2
    the width of something 宽度

    With a span of one mile, it's the region's longest bridge. 桥的跨度有1英里，是这个地区最长的桥。

    The spider has a 3-inch leg span. 蜘蛛脚伸开有3英寸长。

     Synonyms and related words
    Length, width and depth: length, width, depth...
  3. 3
    the differences included in something that you are considering or calculating 数值范围
     Synonyms and related words
    Limits, controls and ranges: red line, limit, constraint...
See also
span
verb [T] /spæn/
present tense
I/you/we/theyspan
he/she/itspans
present participlespanning
past tensespanned
past participlespanned
  1. 1
    to last for a particular period of time, especially a long period 持续（尤指一大段时间）

    His career spanned half a century. 他的职业生涯跨越了半个世纪。

     Synonyms and related words
    To continue for a particular amount of time: last, extend, go back...
  2. 2
    to include the whole of an area 覆盖；遍布；贯穿

    Our business spans the globe. 我们的业务遍布世界各地。

     Synonyms and related words
    To be in a particular position or place: occupy, set, exist...
  3. 3
    if a bridge spans an area of water, it crosses it （桥）横跨

    Little grey bridges span the canals. 灰色的小桥横跨在运河上。

     Synonyms and related words
    To move through an area or object: cross, cut across, push...
  4. 4
    to include a number of different things 包括

    a leisure business spanning hotels, restaurants, casinos, and pubs 包括宾馆、饭店、娱乐场和酒吧的休闲行业

     Synonyms and related words
    To include something or someone: include, take in, involve...
TOEFL IELTS BNC: 6903 COCA: 5718
span

noun¹

 1length長度ADJECTIVE➤full全長▸➤broad, wide範圍廣泛◇a broad span of interests興趣廣泛➤clear淨跨徑◇The bridge has a clear span of 120 feet.這座橋淨跨徑為 120 英尺。➤15-foot, 500-metre/500-meter, etc. * 15 英尺、500 米等跨距▸➤wing (usually wingspan) 翼幅◇The bird has a three-foot wingspan.這隻鳥的翼幅為 3 英尺。
span

noun²

 2length of time時間ADJECTIVE | VERB + SPAN | PREPOSITION | PHRASES ADJECTIVE➤long長時間▸➤brief, short短時間▸➤ten-day, two-week, etc. * 10 天、兩週等時間▸➤entire整個時間▸➤allotted分配的時間◇The speech continued well beyond its allotted span.這個講話大大超過了原定的時間。➤natural (especially BrE) 自然壽命◇to prolong life beyond its natural span延年益壽➤time時間長度▸➤life (usually lifespan) 壽命◇The average lifespan of an American is 75 years.美國人的平均壽命是 75 歲。◇the expected life span for boys born in the US在美國出生的男孩的預期壽命➤attention, concentration, memory注意力持續時間；記憶保持時間◇He has a short attention span.他注意力集中的時間很短。◇a limited attention span有限的注意力持續時間VERB + SPAN➤cover跨越時間段◇The book covers the entire span of Arab history.這本書跨越了整個阿拉伯的歷史。PREPOSITION➤over a/the span歷時⋯◇Developments were monitored over a span of two years.對開發的監控持續兩年。PHRASES➤a span of time, a span of years時間的／年份的跨度
TOEFL IELTS BNC: 6903 COCA: 5718
span noun
⇨ time 2span verb
⇨ lead 3

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